The Dolby encoder in PPro is much more sophisticated than the one in Encore.
There is no way to transfer the Encore Dolby encoder to PPro.
Sorry that's not the answer you wanted to hear.
The Surcode Dolby Digital encoder that you can buy for Premiere Pro is a Dolby Labs logo-certified multichannel encoder.
The Dolby Digital encoder in Encore is a two-channel consumer version.
As Jeff points out, the Minnetonka Audio SurCode DD 5.1 SS plug-in is just that - 6 channel encoding to AC3
The Encore DD encoder is 2 channel (stereo), lacking the additional channels and their settings, though it too encodes to AC3
Different encoders, doing different things. The commonality is that they end up with AC3 files and use Dolby Digital encoding on the different source files.
PS, if you do buy the DD 5.1 SS SurCode plug-in (I highly recommend it for 5.1 SS work), do so from within PrPro, as you will get a "user's" discount of about US$50 (might be less now, as I *think* that SurCode has lowered the price again). I love mine so much that I bought a copy for each machine.